Startup Intros · Jul 2026
Third-party company profile covering ThirdLayer’s founders, product, market positioning, and funding/team context; useful as an independent summary of the company’s positioning and growth.
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
ThirdLayer is the company behind Dex, a browser-native AI coworker / context engine for knowledge work. Public sources disagree on exact funding totals; the company and LinkedIn pages report $125K seed funding, while some third-party databases estimate more.
Primary product
Dex
Founded
2025
Headquarters
San Francisco, California, United States
Team size
1-10
Industry
Technology, Information and Internet
Sub-industry
AI agent infrastructure / browser copilot
Offices
San Francisco, California, United States (HQ)